When we get the sunflower seed cake from pretreatment ,we need to put the cake to the extractor .Then the solvent oil dissolve in the oil . We get the mixed oil . We heat the mixed oil by vapor . And the solvent changes gas . Then we get the oil from the cake .

We want to get the one grade sunflower oil or two grade sunflower oil .And we must refined the crude oil ,by degumming ,decolorization , deodorization , deacidifiztion ,dewaxing . We wipe off the phospholipid , free fatty acid , color ,and smell ,wax . Then the sunflower oil can be used .